MORTGAGE BANKING OPERATIONS - Sensitivity Analysis (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)	Dec. 31, 2022
Key economic assumptions and the sensitivity of the current fair value for single family MSRs
Fair value of single family MSR	$ 76,314
Expected weighted-average life (in years)	8 years 4 months 24 days
Constant Prepayment Rate [Abstract]
Impact on fair value of 25 basis points adverse change in interest rates	$ (508)
Impact on fair value of 50 basis points adverse change in interest rates	(1,189)
Discount Rate [Abstract]
Impact on fair value of 100 basis points increase	(1,515)
Impact on fair value of 200 basis points increase	$ (4,037)
Low | CPRs
Key economic assumptions and the sensitivity of the current fair value for single family MSRs
Measurement input (as a percent)	0.0640	0.0601
Low | Discount rate
Key economic assumptions and the sensitivity of the current fair value for single family MSRs
Measurement input (as a percent)	0.1000	0.0974
High | CPRs
Key economic assumptions and the sensitivity of the current fair value for single family MSRs
Measurement input (as a percent)	0.1960	0.1110
High | Discount rate
Key economic assumptions and the sensitivity of the current fair value for single family MSRs
Measurement input (as a percent)	0.1500	0.1688
Weighted Average | CPRs
Key economic assumptions and the sensitivity of the current fair value for single family MSRs
Measurement input (as a percent)	0.0670	0.0819
Weighted Average | Discount rate
Key economic assumptions and the sensitivity of the current fair value for single family MSRs
Measurement input (as a percent)	0.1000	0.1066